Frame section for producing a backlit false wall, and such a backlit false wall

ABSTRACT

A frame section for producing a backlit false wall and a backlit false wall, having a section body of tubular shape comprising a peripheral wall, a first and a second longitudinal cavity that each have an opening onto the peripheral wall, the first cavity comprising means for attaching at least one canvas, the second cavity accommodating lighting means, wherein the second cavity has an end wall bordered by two diverging cavity walls that delimit the opening of the second cavity.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a national phase entry under 35 U.S.C. § 371 ofInternational Patent Application PCT/FR2021/050512, filed Mar. 24, 2021,designating the United States of America and published as InternationalPatent Publication WO 2021/191566 A1 on Sep. 30, 2021, which claims thebenefit under Article 8 of the Patent Cooperation Treaty to FrenchPatent Application Serial No. FR2002856, filed Mar. 24, 2020.

TECHNICAL FIELD

The present disclosure relates to the field of false walls, and moreparticularly backlit false walls.

The present disclosure relates more particularly to a frame section forproducing a backlit false wall, having a section body of tubular shapecomprising a peripheral wall, a first longitudinal cavity having anopening onto the peripheral wall and comprising means for attaching atleast one canvas, a second longitudinal cavity having an opening ontothe peripheral wall and accommodating lighting means.

The frame section is intended, in particular, but not exclusively, forproducing a backlit three-dimensional structure made from stretchedcanvas(es).

BACKGROUND

In a known manner, false walls, in particular, false ceilings, compriseone or more frame(s), generally metallic, on which one or two flexiblecanvas(es) having a certain elasticity are attached, stretched. To dothis, the canvases in question are provided with attachment means thatcan be attached to appropriate areas provided for this purpose on theframe sections.

There are many configurations of frame sections for producing a falsewall integrating lighting means. Among these, that of the patentapplication EP2993280 is known, which comprises two contiguous recessesseparated by a tongue and intended to receive the attachment means forattaching two stretched canvases and at least one notch foraccommodating a light source. The advantage of such a frame section isthat it allows the production of a backlit three-dimensional structurewith circular and/or curved shapes.

However, although the latter provides satisfactory backlighting, theframe section of the aforementioned application, like all the framesections of the prior art, creates peripheral shadow zones.

BRIEF SUMMARY

The invention aims to remedy this problem by proposing a frame sectionfor producing a backlit false wall, optimally limiting the peripheralshadow created by any section when the latter is used in a backlitcontext.

Another object of the invention is to propose a frame section making itpossible to produce backlit three-dimensional structures of circularand/or curved shapes.

To this end, and according to a first aspect, the present disclosureproposes a frame section for producing a backlit false wall, having asection body of tubular shape comprising a peripheral wall, a first anda second longitudinal cavity that each have an opening onto theperipheral wall, the first cavity comprising means for attaching atleast one canvas, the second cavity accommodating lighting means, theframe section being remarkable in that the second cavity comprises anend wall bordered by two diverging cavity walls that delimit the openingof the second cavity.

Advantageously, each cavity wall is inclined relative to the end wall atan angle of inclination between 110 degrees and 130 degrees.

Advantageously, the ratio between the height of the end wall and theheight of the opening of the second cavity is between 0.4 and 0.5.

Advantageously, the ratio between the depth of the end wall and theheight of the opening of the second cavity is between 0.3 and 0.4.

Advantageously, the second cavity has a trapezoidal shape.

Advantageously, the first and second cavities open onto the peripheralwall in a direction opposite one another.

Advantageously, the peripheral wall defines a junction edge with thecavity walls.

Advantageously, the peripheral wall has two lateral faces, a flat upperface and a flat lower face, the opening of the second cavity (4) openingonto one of the lateral faces and being delimited by the upper and lowerfaces. This arrangement has the advantage of eliminating the residualshadow zones created by the section when it is used in a backlitcontext. Advantageously, the other lateral face onto which the openingof the first cavity opens has a rounded shape.

The present disclosure also relates to a backlit false wall comprising aframe comprising an arrangement of butt-jointed frame sections and atleast one flexible canvas attached to the frame via attachment meansprovided at the edge of the canvas, characterized in that each framesection is as described above and in that at least one frame sectioncomprises lighting means accommodated in the second longitudinal cavity.

Advantageously, the lighting means are mounted on the end wall of thesecond cavity.

Advantageously, the flexible canvas is translucent or transparent.

The advantage of a frame section thus arranged is to offer optimum lightdiffusion while limiting the peripheral shadows created by the sectionwhen it is used in a backlit context.

BRIEF DESCRIPTION OF THE DRAWINGS

Other features and advantages of the present disclosure will becomeapparent from the following detailed description of the presentdisclosure with reference to the accompanying the FIGURE, in which:

FIG. 1 shows a frame section according to the present disclosure forproducing a backlit false wall.

DETAILED DESCRIPTION

In relation to the single the FIGURE, there is described an example of aframe section 1 intended to constitute, with similar frame sections, aframe on which one or two stretched flexible canvas(es) can be fastenedto create a backlit false wall.

To facilitate the description, the frame section 1 will be describedwith respect to its position illustrated in the FIGURE.

The frame section 1 comprises a tubular section body having a peripheralwall 2 defining a first and a second lateral face 20, 21 that areconnected to each other by an upper face 22 and a lower face 23. In theembodiment shown, the upper and lower faces 22, 23 are substantiallyflat, while the first lateral face 20 is rounded. In the example shown,the radius of curvature of the first lateral face 20 is identical to thewidth of the section body, which in turn is identical to the height ofthe section body.

The section body comprises a first cavity 3 extending over the entirelength of the body and having an opening on the first lateral face 20.The first cavity 3, advantageously of parallelepipedal section, forms acavity for attaching stretched canvas.

In the illustrated embodiment, it is arranged to allow the attachment oftwo stretched canvases. To do this, it comprises an inner wing 5extending from the bottom of the first cavity 3 toward the opening ofthe cavity, so as to define, within the first cavity 3, two symmetricalhousings 30, 31 allowing the respective attachment of a canvas. Theattachment of the canvases on the frame section 1 is carried out bymeans of shoulders 6, 7, 8 advantageously arranged on each face of theinner wing 5 as well as on the inner faces of the upper and lower wallsof the section body. These shoulders 6, 7, 8 are arranged to allow theattachment of attachment means, of the harpoon type, provided at theedge of the canvas.

The section body comprises a second cavity 4 extending over the entirelength of the body and having an opening 40 on the second lateral face21. The first and second cavities 3, 4 thus open in a direction oppositeone another.

The second cavity 4 forms a lighting means receiving cavity 9. It has anend wall 41 bordered by two diverging cavity walls 42, 43. The twocavity walls 42, 43 delimit, with the upper and lower faces 22, 23, theopening 40. The cavity walls 42, 43 thus define, with the upper andlower faces 22, 23, two peripheral wings of triangular section. In theillustrated embodiment, the second cavity 4 has a trapezoidal shape,advantageously isosceles. Advantageously, the cavity walls 42, 43inclined relative to the end wall 41 at an angle of inclination αbetween 110 degrees and 130 degrees. Such an arrangement of the framesection makes it possible to minimize the residual peripheral shadowscreated by the section when it is used in a backlit context.

According to an advantageous configuration, the end wall 41 is locatedat a distance from the opening less than or equal to half the distanceseparating the ends of the upper and lower faces 22, 23 that delimit theopening 40. More generally, the second cavity 4 will be arranged topresent a ratio between the height (h₁) of the end wall 41 and theheight (h₂) of the opening 40 of the second cavity 4 between 0.4 and 0.5(h₂ corresponding to the distance separating the ends of the upper andlower faces 22, 23). Similarly, it will be advantageous to arrange thesecond cavity 4 so that the latter presents a ratio between the depth(p) of the end wall 41 and the height (h₂) of the opening of the secondcavity between 0.3 and 0.4. Such an arrangement of the frame sectionthus makes it possible to obtain optimum light diffusion while limitingthe residual peripheral shadows created by the section when it is usedin a backlit context.

The present disclosure is described in the foregoing by way of example.It is understood that a person skilled in the art is in a position toproduce various variant embodiments of the present disclosure withoutthereby departing from the scope of the invention as defined by theclaims.

1. A frame section for producing a backlit false wall, the frame sectionhaving a section body of tubular shape comprising: a peripheral wall; afirst and a second longitudinal cavity that each have an opening ontothe peripheral wall, the first cavity comprising an attachment featureconfigured for attaching at least one canvas to the frame section, thesecond cavity accommodating at least one lighting devices; wherein thefirst and second cavities open onto the peripheral wall in a directionopposite one another and the second cavity comprises an end wallbordered by two diverging cavity walls that delimit the opening of thesecond cavity.
 2. The frame section of claim 1, wherein each cavity wallis inclined relative to the end wall at an angle of inclination between110 degrees and 130 degrees.
 3. The frame section of claim 2, wherein aratio of a height of the end wall to a height of the opening of thesecond cavity is between 0.4 and 0.5.
 4. The frame section of claim 3,wherein a ratio of a depth of the end wall to the height of the openingof the second cavity is between 0.3 and 0.4.
 5. The frame section ofclaim 4, wherein the second cavity has a trapezoidal shape.
 6. The framesection of claim 5, wherein the peripheral wall has two lateral faces, aflat upper face and a flat lower face, the opening of the second cavityopening onto one of the lateral faces and being delimited by the upperand lower faces.
 7. The frame section of claim 6, wherein the otherlateral face onto which the opening of the first cavity opens has arounded shape.
 8. A backlit false wall, comprising; a frame comprisingan arrangement of butt jointed frame sections, each frame section of thebutt jointed frame sections comprising a frame section according toclaim 1; and at least one flexible canvas attached to the frame viaattachment means provided at the edge of the canvas; and lighting meansaccommodated in the second longitudinal cavity of at least one framesection of the butt jointed frame sections.
 9. The backlit false wall ofclaim 8, wherein the lighting means are mounted on the end wall of thesecond cavity of the at least one frame section.
 10. The backlit falsewall of claim 9, wherein the flexible canvas is translucent ortransparent.
 11. The frame section of claim 1, wherein a ratio of aheight of the end wall to a height of the opening of the second cavityis between 0.4 and 0.5.
 12. The frame section of claim 1, wherein aratio of a depth of the end wall to a height of the opening of thesecond cavity is between 0.3 and 0.4.
 13. The frame section of claim 1,wherein the second cavity has a trapezoidal shape.
 14. The frame sectionof claim 13, wherein the peripheral wall has two lateral faces, a flatupper face and a flat lower face, the opening of the second cavityopening onto one of the lateral faces and being delimited by the upperand lower faces.
 15. The frame section of claim 14, wherein the otherlateral face onto which the opening of the first cavity opens has arounded shape.